Modem unit

Modem with call waiting

Modem with hold and quick connect functionality

Modem with noise eliminating circuit

Modem with power-off ring detection

Modem with ring detection/modem processing capability

Modem with ring detection/modem processing capability

Modem with ring detection/modem processing capability

Modem with ring detection/modem processing capability

Modem-telephone interconnect

Monitoring of charges debited to an account having an assigned l

MTA intercom feature

Multi-band modem

Multi-function telephone call management system

Multi-functional personal communications apparatus capable of tr

Multi-functional personal telecommunications apparatus

Multi-functional personal telecommunications apparatus

Multi-level conference management and notification

Multi-line modem interface

Multi-mode modem for automatically switching between data transm